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Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Question
A thin ring of mass 2 kg and radius r=140 mm is held against a frictionless wall by a 125-mm string AB. Determine (a) the distance d, (b) the tension in the string, (c) the reaction at C.
Expert Solution
Step 1
Given Data:
- The mass of the thin ring is, .
- The radius of the ring is, .
- The length of the string AB is, .
Step 2
(a)
The given arrangement can be redrawn as below,
Step 3
The distance can be written as below,
Substitute 125 mm for and 140 mm for in the above expression.
Therefore, the distance is 225 mm.
Step 4
(b)
The expression for the weight of the thin ring can be written as below,
Here, is the acceleration due to gravity which is equal to .
Substitute for and 2 kg for in the above expression.
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